* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0c;
  --surface: #14151a;
  --border: #232530;
  --text: #e8e9ee;
  --muted: #8b8e9b;
  --accent: #5b8cff;
  --accent-hover: #7aa0ff;
  --error: #ff6b6b;
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-shell {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.login-head {
  text-align: center;
  margin-bottom: 24px;
}

.logo-mark {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, #5b8cff, #8e6cff);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: 0.5px;
  font-size: 18px;
  margin: 0 auto 16px;
}

.login-head h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field span {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.field input {
  padding: 12px 14px;
  background: #0d0e13;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  transition: border-color 0.15s;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
}

.btn-primary {
  margin-top: 4px;
  padding: 12px 16px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.error {
  color: var(--error);
  font-size: 13px;
  margin-top: 4px;
  text-align: center;
}

.login-foot {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  text-align: center;
}